Attachment for sawmill-carriages.



Patented lune 4, |901.

l J. H. Bnown. ATTACHMENT FOR SAWMILL CABHIAGES.

(Application led Har. 22, 1901.)

'(No Modal.)

UNTTED STATES PATENT OEEICE.

JAMES IIARDING BROVN, OF EAU CLAIRE, VISCONSIN.

lATTACHMENT FR SAWlVllLL-CARRIAGES.

SPECIFGATION forming part of Letters Patent No. 675,506, dated June 4,1901. Application iiled March 22,1901. Serial No. 52,411. (No model.)

T all whom, t inn/,y concern:

Be it known that I, JAMns HARDING BnowN, a citizen of the United States,residing at Eau Claire, in the county of Eau Claire and State ofW'isconsin, have invented a new and useful Attachment forSawmill-Carriagcs, of which the following is a specification.

The invention relates to an attachment for sawmill-carriages.

One objectof the present invention is to provide a simple, inexpensive,and eflicient device adapted to be readily mounted on a sawmill-carriageand capable of automatic operation to hold a small log and prevent thesame from moving upward on the knees of the sawmill-carriage when theordinary log-turning mechanism is operated.

A further object of the invention is to provide a device ot' thischaracter which will be forced backward out of the way by a large logand which will be automatically swung inward when the knee approachesthe outer end of the head-blocks to prevent it from coming in contactwith the saw.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a transverse sectional view of asawmill-carriage provided with an attachment constructed in accordancewith this invention. Fig. 2 is an end elevation of one of the knees anda portion of the sawmill-carriage. Figs. 3 and 4 are detail views of theattachment.

VLike numerals of reference designate c`orre sponding parts in all thefigures of the drawings.

1 designates a plate provided with a lower enlarged portion 2 anddesigned to be bolted or otherwise secured to one of the side faces of aknee 3 of a sawmill-carriage 4c and having its upper portion oiset fromthe face of the knee to form a recess for the reception of the head of apivot 5, upon which a dog 6 is mounted; The pivot, which may be of anydesired construction, preferably consists of a bolt and is supported bya strap or bracket 7, secured to the knee at a point above the pivot andhaving an outwardly-extending L-shaped portion, which is perforated forthe reception of the said pivot.

The dog G, which is designed particularly for preventing small logs fromrising on the knee when the ordinary log-turning mechanism is operated,is provided with a downwardly-inclined engaging portion, and it has aninwardly or rearwardly extending portion 8, forming a weight for holdingthe engaging portion of the dog normally in the extended position(illustrated in Fig. l ofthe drawings) and resting upon a projection orstop 9,where by the engaging portion of the dog is rigidly held againstupward movement. The projecting or engaging portion of the pawl or dogis adapted to be readily moved inward by a large log, and the innerportion will then swing upward above the projection or stop 9. The dogis purely automatic in its operation, and as soon as such large log isremoved or sawed into lumber the dog will drop back into its normalposition. The plate l is also provided near its front or outer edge witha projection or stop 10, arranged to be engaged by the outer portion ofthe dog to limit the inward swing of the same. The dog is provided atits bottom with a recess 12, in which is arranged a projection or pin13, extending inward or laterally from a lever 14, which is fulcrumed atits upper end on the horizontal pivot and which is adapted to en gage astop of the head-block 16 for apurpose hereinafter explained. The lowerportion 17 is angularly bent to olfset it from the knee to clear theside of the head-block, and the pin or projection 13 may, as indicatedin dotted lines, he provided with a reduced end which is received withina perforation of the lever. The lower end of the lever is slightlycurved, and when the knee approaches the outer end of the head-block thelower end of the lever is carried into engagement with the stop l5 andis `thereby held against further outward movement. This causes the leverto swing the inner or rear portion of the dog upward to withdraw itsouter engaging portion and prevent it from projecting beyond thesawmill-carriage, so that it will not come in contact with the saw. Vhenthe knee is moved inward or backward, the dog and the lever resume theirnormal positions.

roo

It will be seen that the attachment is simple and inexpensive inconstruction, that it is adapted to be readily applied toasawrnillcarriage, and that it is capable of operating automatically tohold small logs to prevent the same from rising on the knee when theordinary log-turning mechanism is operated. It will also be apparentthat the automatic gravity-dog is adapted to be moved inward by a largelog and that it will be swung inward automatically by the lever when theknee is moved to the outer end of the headblock, whereby the dog will beprevented from coming in contact with the saw.

What I claim isl. Adevice of the class described comprising apivotally-mouuted gravity-dog arranged at one side ot' a knee of asawmill-carriage and arranged to prevent a small log from moving upwardwhen the ordinary log-turning mechanism is operated, said dog beingadapted to be swung inward by a large log, and means for automaticallyswinging the dog inward when the knee reaches the end of the head-blockto prevent the dog from coming in contact with the saw, substantially asdescribed.

2. Adevice of the class described comprising a pivoted gravity-dogmounted on a knee of a sawmill-carriage and arranged to prevent a smalllog from moving upward on the knee, stops for limiting the movement ofthe dog, and means for automatically swinging the dog inward when theknee is moved to the outer end of the head-block, substantially asdescribed.

3. A device of the class described comprising a pivoled dog, mounted ona sawmillcarriage knee and adapted to project therefrom to engage asmall log, and capable of being moved inward by a large log, a leverprovided with means for engaging the dog to swing the same inward, and astop mounted on the head-block and adapted to be engaged by thelever,nsubstantially as described.v

4t. A device of the class described comprising a plate provided with anenlarged portion and having a pivot, a bracket supporting the pivot, adog mounted on the said pivot and having an extended inner portion, aprojection receiving the inner portion of the dog, a stop mounted on theplate and arranged to be engaged by the outer portion of the dog, alever suspended from the said pivot and provided with means for engagingthe dog, and a stop mounted on the head-block and adapted to be engagedby the lever, substantially as described.

In testimony that l claim the foregoing as my own I have hereto aiiixedmy signature in the presence of two witnesses.

JAMES HARDNG BROWN.

Witnesses:

F. H. L. COTTEN, WM. J. KnssLER.

